<?php // $Id: save.php,v 1.26.2.2 2008/05/25 14:25:06 skodak Exp $

	require_once('../../config.php');
	require_once('lib.php');


// Make sure this is a legitimate posting

	if (!$formdata = data_submitted("$CFG->wwwroot/mod/survey/view.php")) {
		error("You are not supposed to use this script like that.");
	}

	$id = required_param('id', PARAM_INT);	// Course Module ID

	if (! $cm = get_coursemodule_from_id('survey', $id)) {
		error("Course Module ID was incorrect");
	}

	if (! $course = get_record("course", "id", $cm->course)) {
		error("Course is misconfigured");
	}

	require_login($course->id, false, $cm);
	
	$context = get_context_instance(CONTEXT_MODULE, $cm->id);
	require_capability('mod/survey:participate', $context);
	
	if (! $survey = get_record("survey", "id", $cm->instance)) {
		error("Survey ID was incorrect");
	}

	add_to_log($course->id, "survey", "submit", "view.php?id=$cm->id", "$survey->id", "$cm->id");

	$strsurveysaved = get_string('surveysaved', 'survey');

	$navigation = build_navigation('', $cm);
	print_header_simple("$strsurveysaved", "", $navigation, "");


	if (survey_already_done($survey->id, $USER->id)) {
		notice(get_string("alreadysubmitted", "survey"), $_SERVER["HTTP_REFERER"]);
		exit;
	}


// Sort through the data and arrange it
// This is necessary because some of the questions
// may have two answers, eg Question 1 -> 1 and P1

	$answers = array();

	foreach ($formdata as $key => $val) {
		if ($key <> "userid" && $key <> "id") {
			if ( substr($key,0,1) == "q") {
				$key = clean_param(substr($key,1), PARAM_ALPHANUM);   // keep everything but the 'q', number or Pnumber
			}
			if ( substr($key,0,1) == "P") {
				$realkey = (int) substr($key,1);
				$answers[$realkey][1] = $val;
			} else {
				$answers[$key][0] = $val;
			}
		}
	}


// Now store the data.

	$timenow = time();
	foreach ($answers as $key => $val) {

		$newdata->time = $timenow;
		$newdata->userid = $USER->id;
		$newdata->survey = $survey->id;
		$newdata->question = $key;
		if (!empty($val[0])) {
			$newdata->answer1 = $val[0];
		} else {
			$newdata->answer1 = "";
		}
		if (!empty($val[1])) {
			$newdata->answer2 = $val[1];
		} else {
			$newdata->answer2 = "";
		}

		if (! insert_record("survey_answers", $newdata)) {
			error("Encountered a problem trying to store your results. Sorry.");
		}
	}

// Print the page and finish up.

	notice(get_string("thanksforanswers","survey", $USER->firstname), "$CFG->wwwroot/course/view.php?id=$course->id");

	exit;


?>
